Java实现监控目录下文件变化

import java.io.File;
import java.io.FileFilter;

import org.apache.commons.io.monitor.FileAlterationListenerAdaptor;
import org.apache.commons.io.monitor.FileAlterationMonitor;
import org.apache.commons.io.monitor.FileAlterationObserver;

/**
* @author root
*
*/
public class MyFileListener extends FileAlterationListenerAdaptor {

/**
* File system observer started checking event.
*/
@Override
public void onStart(FileAlterationObserver observer) {
super.onStart(observer);
System.out.println("begin");
}

/**
* File system observer finished checking event.
*/
@Override
public void onStop(FileAlterationObserver observer) {
super.onStop(observer);
System.out.println("end");
}

@Override
public void onFileCreate(File file) {
System.out.println("onFileCreate:" + file.getName());
}

@Override
public void onFileChange(File file) {
System.out.println("onFileChange : " + file.getName());
}

public static void main(String[] args) {
try {

// 构造观察类主要提供要观察的文件或目录，当然还有详细信息的filter
FileAlterationObserver observer = new FileAlterationObserver("/home/share/", new FileFilter() {
@Override
public boolean accept(File pathname) {
return true;
}
});

MyFileListener listener = new MyFileListener();
// 为观察对象添加收听对象
observer.addListener(listener);
// 配置Monitor，第一个参数单位是毫秒，是监听的间隔；第二个参数就是绑定我们之前的观察对象。
FileAlterationMonitor fileMonitor = new FileAlterationMonitor(3000,
new FileAlterationObserver[] { observer });
// 启动开始监听
fileMonitor.start();
} catch (Exception e) {
e.printStackTrace();
}
}
}